iOS - Icons

Use of Icons

It is an image representation used for an action or depicts something related to the application.

Different icons in iOS

AppIcon

App icon for the App Store

Small icon for Spotlight search results and Settings

Toolbar and navigation bar icon

Tab bar icon

AppIcon

AppIcon is the icon for application that appears on the device springboard (the default screen that consists of all the applications.)

App icon for the App Store

It is a high resolution image of app icon of size 512 x 512 or 1024 x 1024(recommended)

Small icon for Spotlight search results and Settings

This small icon is used in searched list of application. It is also used in the settings screen where the features related to the application are enabled and disabled. Enabling location services is one such example.

Toolbar and navigation bar icon

There are list of standard icons that are specially made for use in the toolbar and navigation bar. It includes icons like share, camera, compose and so on.

Tab bar icon

There is a list of standard icons that are specially made for use in Tab bar. It includes icons like bookmarks, contacts, downloads and so on.

There are special guidelines for the size of each icon for different iOS devices. You can explore further on the icon guidelines in apple documentation on Human Interface Guidelines.